quote:This ad really makes 5k oil changes with a 503 oil seem silly. If you drive in severe conditions and dropped the numbers in half, you could go 9500 miles with a 1.8T, which is about the same as the schedualed Audi service interval - Thanks to the Audi Variable Servicing Intervals programme, Audi owners need not be inconvenienced by traditional fixed service intervals. There is no predetermined mileage for a service. Depending on how you drive, the interval will be up to 19,000 miles /24 months for petrol engines, up to 22,000 miles/24 months for the V6 TDI diesel and up to 30,000 miles/24 months for 3 and 4 cylinder TDI diesel engines.
Originally posted by Audi Junkie: In Europe, iirc "sludge" is not an issue and they do extended drains up to 30,000 miles on VW 503.01. http://www.audi.co.uk/customer/servicingoption.jsp